MSR3_14 Datasheet, PDF (3/8 Pages) Radiometrix Ltd – NBFM Multi-channel receiver for 868MHz SRD band

1A: RF IN
2A: RF GND
1 = RSSI
2 = 0V
3 = VCC
4 = AFOUT
5 = RXD
6 = P0/PGM
7 = P1
8 = P2
9 = P3
28mm
1.7mm
57mm
30.48mm (1.2")
9mm
1A 2A
1 2 3 4 56789
Figure 3: MSR3 Footprint
11 holes of 0.8mm dia, pin spacing 2.54mm (0.1")
Pin Description - MSR3
Pin
Name
1A
RF in
2A
RF GND
Function
50Ω RF input from antenna
RF ground, internally connected to the module screen and pin 2 (0V)
1
RSSI
2
0V
3
Vcc
4
AF out
5
RXD
6
P0/PGM
7
P1
8
P2
9
P3
DC level between 0.5v and 2.5v. 60dB dynamic range
Ground
Supply input 4.5 - 15v
700mV p-p audio. DC coupled, approx 1v bias
Open collector output of data slicer suitable for Biphase codes
Parallel Channel select LSB
Serial frequency programming / configuration¹
Parallel Channel select
Parallel Channel select
Parallel Channel select MSB
Notes:
1.
2.
3.
4.
5.
The actual
There is no pullup on the open collector RXD output.
P0-P3 are inverted parallel frequency select inputs. They have 10K pullups to 4.4v
P0 requires a logic level inverted RS232 data stream when used for programming
A version of the LMR2 firmware is used, so most variants of the LM_series will also be
possible for the MSR3
Two pinout versions are offered: With conventional pins, out of the bottom of the unit
With right-angle pins, to allow 'SIL' vertical mounting
pinout and footprint follows the NRX1/2 type radio, with the addition of P0-P3
Radiometrix Ltd, MSR3 Data Sheet
page 3